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Laser-driven strong magnetostatic fields with applications to charged beam transport and magnetized high energy-density physics

Research output: Contribution to journalArticle

Author(s)

  • J. J. Santos
  • M. Bailly-Grandvaux
  • M. Ehret
  • A. V. Arefiev
  • D. Batani
  • F N Beg
  • A Calisti
  • S Ferri
  • R. Florido
  • P. Forestier-Colleoni
  • S. Fujioka
  • M. A. Gigosos
  • L. Giuffrida
  • L. Gremillet
  • J. J. Honrubia
  • S. Kojima
  • Ph Korneev
  • K. F.F. Law
  • J. R. Marquès
  • A. Morace
  • C. Mossé
  • O. Peyrusse
  • S. Rose
  • M. Roth
  • S. Sakata
  • G. Schaumann
  • F. Suzuki-Vidal
  • V. T. Tikhonchuk
  • T. Toncian
  • Z. Zhang

Department/unit(s)

Publication details

JournalPhysics of Plasmas
DateAccepted/In press - 1 Apr 2018
DatePublished (current) - 1 May 2018
Issue number5
Volume25
Original languageEnglish

Abstract

Powerful nanosecond laser-plasma processes are explored to generate discharge currents of a few 100 kA in coil targets, yielding magnetostatic fields (B-fields) in excess of 0.5 kT. The quasi-static currents are provided from hot electron ejection from the laser-irradiated surface. According to our model, which describes the evolution of the discharge current, the major control parameter is the laser irradiance Ilasλlas2. The space-time evolution of the B-fields is experimentally characterized by high-frequency bandwidth B-dot probes and proton-deflectometry measurements. The magnetic pulses, of ns-scale, are long enough to magnetize secondary targets through resistive diffusion. We applied it in experiments of laser-generated relativistic electron transport through solid dielectric targets, yielding an unprecedented 5-fold enhancement of the energy-density flux at 60 μm depth, compared to unmagnetized transport conditions. These studies pave the ground for magnetized high-energy density physics investigations, related to laser-generated secondary sources of radiation and/or high-energy particles and their transport, to high-gain fusion energy schemes, and to laboratory astrophysics.

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